Belfast Maine Climate Data

Monthly Average Climate Data for Belfast Maine

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.3 °F29.7 °F3.98 in.
February12.8 °F32.5 °F3.25 in.
March21.5 °F40.0 °F3.87 in.
April32.5 °F52.0 °F4.42 in.
May42.6 °F63.3 °F3.82 in.
June52.1 °F72.1 °F4.33 in.
July58.0 °F77.9 °F3.14 in.
August57.0 °F77.4 °F3.25 in.
September49.5 °F70.2 °F3.95 in.
October39.2 °F58.0 °F5.49 in.
November29.8 °F46.3 °F4.66 in.
December19.0 °F35.6 °F4.59 in.
Annual35.4 °F54.6 °F48.75 in.

Climate Data for Belfast Maine

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year